“The whole background of Mitt Romney is taking over businesses and trying to figure out how to straighten out the balance sheet, how to straighten out the business, how to bring more value … That’s what private equity firms do. That’s how they make their fortune,” he said.

Rudy Giuliani One-on-One

"Mitt Romney has exactly what it takes to handle what this country needs right now," says Rudy Giuliani, Giuliani Partners. He also tells CNBC's Larry Kudlow he would rather have a president who has been "successful in business."

“I know they’re trying to use how successful he’s been at Bain against him on the Democratic side. But from my point of view, I would rather have a president who’s been successful in business than a president who has no experience like the one we presently have.”

Giuliani, who had declined to voice support for any particular Republican candidate during the primaries, saying he had “a lot of obligations” to the presidential hopefuls for their support of him in the past.

“I had a lot of good friends in this race. I would like to have supported Rick Perry,” he said, adding that he had “a real friendship and a real affinity for Newt (Gingrich).”

But his support of Romney for president is real, Giuliani said.

“I have no lingering doubts that Mitt Romney has exactly what it takes to handle what this country needs right now,” he said.

Asked by host Larry Kudlow whether he thought current New York Mayor Mike Bloomberg would “go rogue” and make a bid for the White House, Giuliani ventured a guess.

“Mike has always told me he would only run if I had a realistic chance of being elected president,” he said, adding that it was only a guess and that Bloomberg had “no chance” at present.